If you know how to get to Archie in the water basin it is the exactly same method to get to Maxie in a sort of lavary place
In emerald find out in ruby orgin cave.
In Pokemon ruby, your rivals are team magma, not team aqua, so you cannot find Archie, only maxie.
You can find Maxie's Submarine in Seafloor Cavern on Route 128. From Mossdeep City, surf, and then use dive. Go all the way down till you get to the circle. go around it, an enter the underwater cavern. There, you will find the Submarine.
beat maxie the second time then he will use the blue orb then he dissappeared then you have to go to the cave of orgins
The Leaders of Team Magma and Team Aqua.
it depends witch of the games you have in ruby theres team magma(maxie) and in Sapphire theres team aqua(Archie) and you will see sombody of them in mt chimney
YOU TRADE IT WITH MAXIE THE TEAM MAGMA LEADER
after you find the underwater cavern and defeat Maxie, he is in the cave of origin in sootopolis.Get lots of ultra balls because you'll want to save your master ball for latios.
after you beat maxie some how the blue orb shines and it will spread and hit groudon
U go to the magma hideout and defeat Maxie
From fortree city go to lilycove and go to magma or aqua base.Before going to Maxie or Archie go another way. There u will find nugget and masterball and voltorbs
Team Magma boss Maxie in their hideout in the cave by Lilicove's shore